This presentation will include a brief review of canine ocular anatomy, specifically the lens, and pathophysiology of cataract formation. We will discuss the different types and stages of cataracts and complications associated with cataract development. Methods for determining who is a good candidate for cataract surgery, the surgical procedure itself (phacoemulsification), success rates and complications will be covered. Finally, we will review other common diseases of the canine lens such as lens luxation.